Evidence map›Paper›PMID 35813733›Full record

ArticleJournal of thoracic disease2022

Effect of hospital case volume on clinical outcomes of patients requiring extracorporeal membrane oxygenation: a territory-wide longitudinal observational study.

Pauline Yeung Ng, April Ip, Shu Fang, Jeremy Chang Rang Lin, Lowell Ling, Kai Man Chan, Kit Hung Anne Leung, King Chung Kenny Chan, Dominic So, Hoi Ping Shum and 3 more

Abstract read
In one paragraph

Article in Journal of thoracic disease, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

5 citing papers in PubMed.

  1. [ECMO-care at the crossroads between centralization and regional healthcare realities].Medizinische Klinik, Intensivmedizin und Notfallmedizin · 2025
    Article
  2. Review
  3. Hospital-level volume in extracorporeal membrane oxygenation cases and death or disability at 6 months.Critical care and resuscitation : journal of the Australasian Academy of Critical Care Medicine · 2024
    Article
  4. Article
  5. Bridging hope: South Africa's ECMO reporting journey begins.African journal of thoracic and critical care medicine · 2023
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors.

Pauline Yeung Ng *Department of Medicine, The University of Hong Kong, Hong Kong, China.
April Ip *Department of Medicine, The University of Hong Kong, Hong Kong, China.
Shu Fang *Department of Medicine, The University of Hong Kong, Hong Kong, China.
Jeremy Chang Rang LinDepartment of Medicine, The University of Hong Kong, Hong Kong, China.
Lowell LingDepartment of Anesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China.
Kai Man ChanDepartment of Anesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong, China.
Kit Hung Anne LeungDepartment of Intensive Care, Queen Elizabeth Hospital, Hong Kong, China.
King Chung Kenny ChanDepartment of Intensive Care, Tuen Mun Hospital, Hong Kong, China.
Dominic SoDepartment of Intensive Care, Princess Margaret Hospital, Hong Kong, China.
Hoi Ping ShumDepartment of Intensive Care, Pamela Youde Nethersole Eastern Hospital, Hong Kong, China.
Chun Wai NgaiDepartment of Adult Intensive Care, Queen Mary Hospital, Hong Kong, China.
Wai Ming ChanDepartment of Adult Intensive Care, Queen Mary Hospital, Hong Kong, China.
Wai Ching SinDepartment of Adult Intensive Care, Queen Mary Hospital, Hong Kong, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: The utilization of extracorporeal membrane oxygenation (ECMO) has increased rapidly around the world. Being an overall low-volume high-cost form of therapy, the effectiveness of having care delivered in segregated units across a geographical locality is debatable. Methods: All adult extracorporeal membrane oxygenation cases admitted to public hospitals in Hong Kong between 2010 and 2019 were included. "High-volume" centers were defined as those with >20 extracorporeal membrane oxygenation cases in the respective calendar year, while "low-volume" centers were those with ≤20. Clinical outcomes of patients who received extracorporeal membrane oxygenation care in high-volume centers were compared with those in low-volume centers. Results: A total of 911 patients received extracorporeal membrane oxygenation-297 (32.6%) veno-arterial extracorporeal membrane oxygenation, 450 (49.4%) veno-venous extracorporeal membrane oxygenation, and 164 (18.0%) extracorporeal membrane oxygenation-cardiopulmonary resuscitation. The overall hospital mortality was 456 (50.1%). The annual number of extracorporeal membrane oxygenation cases in high- and low-volume centers were 29 and 11, respectively. Management in a high-volume center was not significantly associated with hospital mortality (adjusted odds ratio (OR) 0.86, 95% confidence interval (CI): 0.61-1.21, P=0.38), or with intensive care unit mortality (adjusted OR 0.76, 95% CI: 0.54-1.06, P=0.10) compared with a low-volume center. Over the 10-year period, the overall observed mortality was similar to the Acute Physiology And Chronic Health Evaluation IV-predicted mortality, with no significant difference in the standardized mortality ratios between high- and low-volume centers (P=0.46). Conclusions: In a territory-wide observational study, we observed that case volumes in extracorporeal membrane oxygenation centers were not associated with hospital mortality. Maintaining standards of care in low-volume centers is important and improves preparedness for surges in demand.

Indexed as

case volumeExtracorporeal membrane oxygenation (ECMO)intensive care unit (ICU)length of stay (LOS)mortality

Identifiers

PMID35813733
PMCPMC9264048

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.